You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Donald Davis.

ASSISTANT: How can I help you today?

USER:  I have to book a flight ticket  that I am unable to do, could you please help me in booking flight ticket on dates 06/04 and 06/06?

ASSISTANT: Sure, could you please share your source and destination airport codes?

USER: Sure, my airport codes are HOU and SEA.

ASSISTANT: May I know if you prefer to have any other comforts in your journey?

USER: I need a connecting flight.

ASSISTANT: Thank you for providing your details, please wait for a while.

USER: Ok.

ASSISTANT: Delta airlines is providing a service for you with single connection and price 100. Shall I book an economy class ticket?

USER: Yes, please.

ASSISTANT: your seat has been reserved with the flight number-1025.

USER: Thank you.

ASSISTANT: It's pleasure to serve you.