You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER:        Can you please book a flight ticket from IAH to AUS?

ASSISTANT: Sure, can I know your travelling dates?

USER: I want to travel on dates Apr 18 and 20.

ASSISTANT: On which name should I reserve the flight ticket?

USER: My name is Amy Smith.

ASSISTANT: Do you have any connection limit?

USER:        I need a direct flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Sorry, there are no flights found on given dates.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for reaching us.