You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Pamela Scott.

ASSISTANT: How may I assist you?

USER: I have planned for the trip to San Francisco, can you please aid me to reserve a flight ticket?

ASSISTANT: Sure, I am here to help you out. May I know your airport codes please?

USER: Thank you for your response. My airport codes are CLT and SFO.

ASSISTANT: May I know your travelling dates please?

USER: The travel dates which I have planned are 06/20 and 06/22.

ASSISTANT: Wait a moment please, let me check with that. Pamela Scott, there are no flights available in your route.

USER: It's ok, not a problem with that one. Thank you for your help.

ASSISTANT: Thank you for choosing us.

USER: You are welcome.