You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I need your help to book a ticket from LGA to DCA.

ASSISTANT: Can you provide your journey dates?

USER: Departure date is 01/11 and return date is 01/13.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Can I know your name please?

USER: My name is Mary Scott.

ASSISTANT: Sorry Scott, I did not found any flight with your details.

USER: That's really sad. Anyways, thank you for the information.

ASSISTANT: Your welcome.