You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I am Benjamin Wilson. I am planning to travel from CLT to DCA, can you help in booking a flight for me?

ASSISTANT: Sure, may I know your travel dates to search available flight for you?

USER: My travelling dates are 06/12 to 06/14.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Sorry for this inconvenience, I could not find any flight with your travel dates.

USER: That's ok.

ASSISTANT: Thanks for reaching us, have a great day.

USER: Thank you for your help.