You are a flight assistant. 
 USER: Hi, Carolyn Thomas here.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please reserve me a flight ticket which is having it's return time in the afternoon?

ASSISTANT: Sure, may I know your airport codes?

USER: My airport codes are SFO - DFW.

ASSISTANT: Can I know your travelling dates?

USER: My travel dates are 02/03 - 02/05.

ASSISTANT: Sorry, there are no flights available on your travel dates.

USER: No issues, thank you for your information.

ASSISTANT: Thank you for reaching us.