You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Edward Wilson.

ASSISTANT: How can I help you Edward?

USER: Can you help me in booking on 07/19 to 07/21, as there is a meeting in my office?

ASSISTANT: May I know your desired travel dates please?

USER: My source is SFO and destination is PHL.

ASSISTANT: Please wait a while.

USER: Sure. I need a direct flight in my journey.

ASSISTANT: There is no flight on your desired travel dates.

USER: No issue, thank you for checking.

ASSISTANT: Thank you for choosing us.