fix(Book): added control when supplier doesn't send Response field.
![image](/uploads/d2509d14d63b755d20732a906842b33c/image.png) ![image](/uploads/0ef40df2f9c9547ecb5c6d01a2c49ffa/image.png) ![image](/uploads/1e4fb2158cafeb07951523e510aa4d50/image.png)
Sellers at 2023-02-20:
- Avra Tours - [AVR]
- CyberLogic - [CYL]
- Welcome Holidays (Mega Travel Selections) - [MGTS]
- Filos Holidays and Travel - [FHT]
- Kalamaki Travel - [KALT]
- Le Grand Tourism Enterprise - [LGTE]
- Holiday Moments - [HLDM]
- El Greco Tours - [EGT]
- Master Group Tour Operator - [MTT]
- KCG Travel SMPC - [KCG]