You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Myself Mark Turner. I want to visit Mint Museum with my friend's.Could you please help me in booking a ticket?

ASSISTANT: Sure, could you please provide your travelling dates?

USER: My journey dates are from 12/30 to 01/01.

ASSISTANT: Can you please help me with the airport codes?

USER: My source code is IAD and my destination is CLT.

ASSISTANT: Please allow me a moment to check for the availability of flight.,.

USER: Sure.

ASSISTANT: Mark, I am sorry to inform you that there is no flight available at your request.

USER: Ok, no issue.Thank you for your help.

ASSISTANT: You are welcome. Thank you for contacting us.