You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. I may I assist you?

USER: My name is Brian king. I am planning to travel to San Francisco, can you book a ticket with the airport codes BOS and SFO.

ASSISTANT: Sure, can you please share your travelling dates?

USER: The travelling dates are 02/05 and 02/07.

ASSISTANT: Ok, please wait a moment.

USER: Take your time.

ASSISTANT: Sorry for the inconvenience, there is no flight found on your name.

USER: That is not an issue, I will choose any other source to travel that place.

ASSISTANT: Thank you for consulting us.

USER: Thank you helping me out.