You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Susan Martin here and I would like to meet my childhood friend in Atlanta, so can you please help me out with booking of a flight ticket to go there?

ASSISTANT: Sure, I am glad to help you. May I know your travelling dates?

USER: Thank you. Sure, I am planning to go on 07/23 and please book a return ticket on 07/25.

ASSISTANT: May I know your preferable airport codes?

USER: Sure, I want to travel from IAD to ATL.

ASSISTANT: May I know your good name for booking purpose?

USER: Sure, my name is Susan Martin.

ASSISTANT: Thank you for your information. Sorry to say, there are no flights obtained on your dates when I search in my data base.

USER: Oh! So sad to hear. Anyway, I will choose another way to go there. Thank you for the information.

ASSISTANT: Thank you for reaching us. Have a nice day.

USER: Welcome.