You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself David Clark.

ASSISTANT: How may I assist you David Clark?

USER: Can you help me in booking a flight from SEA to IAH?

ASSISTANT: Sure. When are you travelling to IAH?

USER: As there is a business meeting on 07/19 to 07/21.

ASSISTANT: Let me check is there any flight available or not on 07/19 to IAH.

USER: Sure.

ASSISTANT: Flight-1004 is available with Spirit airlines.

USER: Book it.

ASSISTANT: Ticket is booked on the name of David Clark.

USER: Thank you for reserving my seat.

ASSISTANT: Thank you for choosing us to fly .We look forward to serve you onboard.