You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I need to book a direct flight to Charlotte, NC - CLT under a fare of 1000.

ASSISTANT: Ok, may I know when you have planned to travel?

USER: I have planned on 01/19 to 01/21.

ASSISTANT: Ok, please share your source code for further process.

USER: Washington DC - IAD is my source airport code.

ASSISTANT: Ok, may I know your name please?

USER: My name is Angela Lewis.

ASSISTANT: Wait a minute please.

USER: Sure.

ASSISTANT: Thanks for your time, sorry to say mo flights found with your details.

USER: Ok, not an issue.

ASSISTANT: Thank you for reaching us, have  a nice day.

USER: Thank you.