You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: My name is Carol Harris. Would you help me in booking a ticket on the dates of 08/15 and 08/17?  As I have an exams.

ASSISTANT: Sure, we are here to help you. Kindly mention your travel dates.

USER: I already mentioned, check it once.

ASSISTANT: May I know your airport codes?

USER: Boarding point is Austin, AUS. Destination is Houston, HOU.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: Not a problem. Thank you for your service.

ASSISTANT: Thanks for reaching us.