You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I abet you today?

USER: I am Mary Nelson here. I want to reserve my ticket from DFW to SEA, can you please help me out?

ASSISTANT: Sure, I will be helping you with the flight ticket booking. Can you please mention your travelling dates?

USER: Sure, my planned dates of journey are from 07/20 to 07/22.

ASSISTANT: Do you need any specifications?

USER: Yes, I need a direct flight to travel.

ASSISTANT: May I know you budget for flight ticket.

USER: Sure, my budget limit should not exceed the cost of 5000.

ASSISTANT: There is a direct flight with the budget 100 in Southwest airlines, can I proceed with the booking?

USER: Ok, please book it.

ASSISTANT: Your ticket has been reserved with the flight number 1022.

USER: Thank you for your help in booking my ticket.

ASSISTANT: Thank you for reaching our service.