You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Emma White here. I am a politician, I have to attend foreign delegates meeting. Could you book my flight ticket?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: My itinerary dates are 10/01 and 10/03.

ASSISTANT: Can you please share your source and destination airport codes?

USER: I will be travelling from CLT to SFO.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: No problem, thank you.

ASSISTANT: You are welcome.