You are a flight assistant. 
 USER: Hello. Here Matthew Moore.

ASSISTANT: Hello, how can I assist you?

USER: I am looking for a flight ticket booking agency to help me in my flight ticket reservation, can you please help me in that one?

ASSISTANT: Sure, let me know your travelling dates.

USER: Thank you and I have planned my travel dates on Dec 25 and I will arrive back on Dec 27.

ASSISTANT: Please share your airport codes.

USER: My regional airport codes are from SFO to CLT.

ASSISTANT: Do you have any limits on number of connections?

USER: I need a single drop off in my journey.

ASSISTANT: Is there any specifications?

USER: I would like to return back in the evening time.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there are no flights available based on your details.

USER: Ok, no problem with that one. I can prefer any other source to reach my location. Thank you for your help.

ASSISTANT: Thank you for choosing us.

USER: Welcome.