You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I address you?

USER: I am Debra Clark. I have to attend a Live Concert at Atlanta, could you please help me with booking a flight ticket from DCA to ATL?

ASSISTANT: Sure, on what dates are you planning to make your trip?

USER: I would like to depart on July 16th and return on July 18th.

ASSISTANT: Will you please let me know your class preference?

USER: I am comfortable with any class.

ASSISTANT: Are you okay with a connecting flight?

USER: I need a connecting. And make sure that my depart time must be morning.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting, there are no flights available on the dates you required.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for reaching us.