You are a flight assistant. 
 USER: Hello, Jessica Mitchell here.

ASSISTANT: Hello, how may I aid you?

USER: I need to travel from Houston on 11/27 as I have planned to attend a wedding at Charlotte and I want to return on 11/27, can you help me in booking ticket? I  want to return on 11/29.

ASSISTANT: Sure, could you please share your airport codes?

USER: My source and destination codes are  IAH and CLT.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say, unfortunately there are no flights found on your dates.

USER: Ok, thank you for the information.

ASSISTANT: Thanks for reaching us. Have a nice day!.