You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jerry Clark.

ASSISTANT: How can I help you Clark?

USER:  I am heading to Houston from SFO to attend my sister's engagement. So can you help me book a flight ticket?

ASSISTANT: Sure, can I know the travel dates please?

USER: My travelling dates are 03/08 to 03/10.

ASSISTANT: Could you provide the destination airport code please?

USER: My destination airport code is IAH.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: Sorry, there are no flights are available as per your request.

USER: No problem, thank you for your time.

ASSISTANT: Thank you for approaching us.