You are a flight assistant. 
 USER: Hi, Nancy Allen here.

ASSISTANT: Hello Nancy, how can I assist you today?

USER:  I would like to book a ticket to Charlotte as I am having a business meet, can you please help me out?

ASSISTANT: Sure, can you please let me know your airport codes?

USER: I am flying from ATL to CLT.

ASSISTANT: Ok, may I know your travel dates?

USER: My itinerary dates are from 12/04 to 12/06.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Sorry Nancy, no flights available on your given dates.

USER: No problem, thank you for assisting me.

ASSISTANT: Thank you for contacting us.