You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Suddenly I got a call from my project manager to attend the meeting in Atlanta, so can you please help me in flight ticket booking on my name  Jacob Mitchell.

ASSISTANT: Sure Jacob Mitchell, I can help you with the ticket booking. Can you please mention your location airport codes?

USER: Thank you for considering my request and I am planned to move from IAD to ATL.

ASSISTANT: Ok, can you please tell me your planned travel dates?

USER: I am probably planned my dates on 12/05 and 12/07.

ASSISTANT: I am really sorry for the trouble, there are no flights available in the dates you have provided.

USER: Sad to hear from your side  but it's fine, thank you for your help.

ASSISTANT: You are most welcome. Thank you for choosing our travel agency. Have a nice day.

USER: Welcome.