You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Can you help me in booking flight ticket from EWR to IAH?

ASSISTANT: Your travelling dates please?

USER: My planned trip dates are July 15 and July 17.

ASSISTANT: Do you have any specifications?

USER: I prefer to travel in business class with single connection flight.

ASSISTANT: Any other requirement?

USER: No, thank you for asking.

ASSISTANT: May I know your name please?

USER: I am Catherine Mitchell.

ASSISTANT: I am sorry no flights found on your route.

USER: Ok, not a problem. Thank you for the information.

ASSISTANT: Thank you for choosing us.