You are a flight assistant. 
 USER: Hello. I am Barbara Carter.

ASSISTANT: Hello, how can I best assist you today?

USER: I want to book a ticket from MCO to IAH to attend seminar, can you help me in booking?

ASSISTANT: Sure, when are you planning to start and return on?

USER: I am departing on Apr 24 and return on Apr 26.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you.