You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I have planned to meet my family friend at New York, EWR. Can you please book a ticket on July 7?

ASSISTANT: Yes, can you tell me your source airport code?

USER: My source airport code is DFW.

ASSISTANT: Ok, can I know your return date?

USER: I want to return on July 9.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: Ok, no worries. Thank you for your service.

ASSISTANT: Can I know your name?

USER: Sure, I am Brenda Miller.

ASSISTANT: Thank you for contacting us.