You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: Myself Betty Garcia. Will you help me in booking the flight ticket from IAH to IAD?

ASSISTANT: Sure, may I know your trip dates?

USER: My travelling dates are Mar 31 and Apr 02.

ASSISTANT: Do you need any halt in between journey?

USER: I need a direct flight.

ASSISTANT: Which class do you prefer either economy or business?

USER: I am comfortable in any class.

ASSISTANT: Thanks for your details, please be on hold.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry, there are no flights found on your specified routes.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for availing us.