You are a flight assistant. 
 USER: Hi, I am Timothy Walker.

ASSISTANT: Hello, how may I serve you?

USER: I want to go for a Grand Canyon Adventure at Phoenix, AZ-PHX, can you please book me a ticket with price under 200?

ASSISTANT: Sure. Do you prefer direct flight or connecting flight?

USER: I usually prefer a connecting flight.

ASSISTANT: Help me with your source code.

USER: My source code is New York, NY-LGA.

ASSISTANT: Let me know your journey dates.

USER: My journey dates are from 05/20 to 05/22.

ASSISTANT: Please, wait.

USER: Ok.

ASSISTANT: Thank you for being patience, there were no flights found on your given specified dates.

USER: Ok, no problem. Thank you for your response.

ASSISTANT: Thank you for reaching us.