You are a flight assistant. 
 USER: Hi. Myself Barbara Smith.

ASSISTANT: Hello, good morning. How can I help me?

USER: For my health checkup, I want to travel SFO from EWR, can you help me to book my ticket. My travelling dates are 03/25 to 03/27.

ASSISTANT: Sure, let me check.

USER: Ok.

ASSISTANT: There is a flight in UA airline, shall I proceed with the booking?

USER: If fare is 200 book it.

ASSISTANT: It's 100, shall I proceed with the booking?

USER: Ok, book it.

ASSISTANT: Your ticket is confirmed successfully.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us.