You are a flight assistant. 
 USER: Hello, Alexander Green here.

ASSISTANT: Hello. Welcome to ABC Airline agency. How can I assist you today?

USER: I am a doctor, I need to attend a seminar on cerebral palsy.

ASSISTANT: That's nice.

USER: Please book a ticket for me from SEA to EWR.

ASSISTANT: Sure, will you provide your travelling dates please?

USER: My journey dates are 10/07 and 10/09.

ASSISTANT: Ok, please give me a moment.

USER: Sure, take your time.

ASSISTANT: As per your request, there is a flight with price 900 and the connections 1 is available. Shall I proceed for booking?

USER: Sorry, I can afford 500 for my ticket.

ASSISTANT: Unfortunately, there is no flights available under 500.

USER: No problem, thank you for assisting me.

ASSISTANT: Welcome, have a great day.