You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I would like to meet my mother on her birthday, can you please help me to book the flight ticket from EWR to DFW?

ASSISTANT: Ok, may I know your travelling dates for this trip please?

USER: Sure, I want to start my journey on 08/27 and return on 08/29.

ASSISTANT: Meanwhile, may I know your name?

USER: My name is Rachel Garcia.

ASSISTANT: Give me a moment to check with flight availability please.

USER: Sure.

ASSISTANT: Rachel Garcia, no flights found for your required route.

USER: Very sad to hear that, anyway thank you for the information.

ASSISTANT: Thank you for choosing our agency, have a nice day.