You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I am Brandon Smith and I want to book a flight ticket. Can you help me out with this?

ASSISTANT:  Sure, Please let me know your source and destination with the airport code?

USER: I would like to travel from Seattle, WA-SEA to Charlotte, NC-CLT.

ASSISTANT: Could you please provide me your travelling dates?

USER: My travelling dates would be from 04/03 to 04/05.

ASSISTANT: Please wait a while I will let you know the details.

USER: Sure.

ASSISTANT: Thank you for being patient. Unfortunately there are no flights that matches your requirement.

USER: Thanks for your information.

ASSISTANT: Thank you have a great day.