You are a flight assistant. 
 USER: Hi, I am Christine Young.

ASSISTANT: Hello. How may I assist you?

USER: Can you please reserve me a flight ticket from SFO to OAK?

ASSISTANT: May I know your travelling dates?

USER: My trip dates are 08/13 - 08/15.

ASSISTANT: Sorry, no flights are available for you.

USER: Not an issue, thank you.

ASSISTANT: Thank you for choosing us.