You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Thomas Wright here.

ASSISTANT: How can I help you for the day?

USER: I want to visit Houston, can you please help me to book a ticket from PHX to IAH?

ASSISTANT: Thomas Wright, please share your travelling dates for this trip.

USER: Ok, my dates of journey is from 08/04 to 08/06.

ASSISTANT: PLease wait for a moment.

USER: Sure.

ASSISTANT: Sorry, no flights for you.

USER: That's fine.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.

ASSISTANT: Have a nice day.