You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Frank Allen.

ASSISTANT: How can I guide you at this evening?

USER: Can you help me in booking from PHX to DTW, as there is a tennis competition to attend in Detroit.

ASSISTANT: May I know your travelling dates?

USER: My trip dates are 08/29 to 08/31.

ASSISTANT: Sorry Allen, I did not find any flight on your dates to confirm your ticket.

USER: No issue, thank you.

ASSISTANT: Thank you for reaching us.