You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I want to book a ticket from SFO to PHL, can you help me?

ASSISTANT: Sure, I will help you, please share your travelling dates?

USER: My travel dates are 09/13 and 09/15.

ASSISTANT: May I know your name please?

USER: Myself Gary Jones.

ASSISTANT: Jones, sorry for the inconvenience, no flights as per your details.

USER: No problem, thanks for checking.

ASSISTANT: It's my pleasure.