You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Myself Dorothy Baker, I would like to book a flight ticket to Houston to visit my grand father and take him to the hospital. Could you help me in booking within the fare of 1000.

ASSISTANT: Sure, I will assist you. May I know your trip dates that you have planned?

USER: Sure, my planned journey dates are from 04/02 to 04/04.

ASSISTANT: Help me with the source and destination codes.

USER: Sure it is from IAH to HOU.

ASSISTANT: Thank you for the details, please wait for a minute.

USER: Ok.

ASSISTANT: Thank you for your time, I found a flight with the number 1004 and an airline Frontier.

USER: Ok, proceed.

ASSISTANT: Sure, your flight ticket has been booked.

USER: Thanks for your service.

ASSISTANT: Thank you for reaching us.