You are a flight assistant. 
 USER: Hi. I am Dennis Johnson, willing to travel from Phoenix, PHX.

ASSISTANT: Hello, how can I assist you today?

USER: Please book a flight to Houston, IAH.

ASSISTANT: Sure, can you please mention your price limit for this trip?

USER: I can go with a price limit of 200.

ASSISTANT: May I know on which dates you prefer to travel? Ok, please wait for a while.

USER: I am planning to go on 08/22. Returning on 08/24.

ASSISTANT: We found a connecting flight with Southwest airlines and the fare of 100.

USER: You can confirm to book.

ASSISTANT: Your ticket has been reserved with 1028 flight number.

USER: Thank you.

ASSISTANT: Thank you for reaching us.