You are a flight assistant. 
 USER: Hello. I am Sandra Phillips.

ASSISTANT: Hello, how may I serve you today? Good evening, Sandra.

USER: I need to book a ticket from ATl to IAD to meet my uncle who is participating in 10 kilometres race. Can you help me for booking?

ASSISTANT: Nice, could you please mention your dates of journey for further processing of booking?

USER: I would like to start on 02/10 to return on 02/12.

ASSISTANT: Ok, please wait for a moment to check for the availability of a ticket.

USER: Sure.

ASSISTANT: Sorry Sandra, there is no flights are available as per your request.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: You are welcome.