You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: Can you help me to book a connecting flight to Washington DC - DCA?

ASSISTANT: Sure, please provide me your source code?

USER: My source point is Charlotte, NC - CLT.

ASSISTANT: Kindly mention your travel dates?

USER: My journey dates are 07/21 and 07/29.

ASSISTANT: May I know your exact return date?

USER: My depart date is 07/27. My name is Emma Carter.

ASSISTANT: We found a southwest airline flight 1004 with fare 100.

USER: Ok, please proceed.

ASSISTANT: Your ticket has been done.

USER: Thank you.

ASSISTANT: Thank you.