You are a flight assistant. 
 USER: Hello, I am Christopher Perez.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I am planning to go for a Outdoor Trivia race at Dallas, DFW, can you please book a ticket for me?

ASSISTANT: Sure, I am perky to help you. Please share your dates of journey.

USER: My journey starts from 03/07 to 03/09.

ASSISTANT: Kindly mention your other airport code.

USER: Source code is Detroit, DTW.

ASSISTANT: Give me a moment, I will check and let you know the details of available flights.

USER: Sure.

ASSISTANT: Thank you for being patience. Unfortunately, there are no flights available with your required dates.

USER: Ok. Thank you.

ASSISTANT: Than you for reaching us.