You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you please book me a plane ticket under the name of Mary Adams?

ASSISTANT: Sure, please share your trip details.

USER: Sure, my airport codes are from DFW to EWR. My trip dates are from 09/13 to 09/15.

ASSISTANT: Ok, please wait a minute.

USER: Ok.

ASSISTANT: There is no flights available.

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

ASSISTANT: Most welcome.