You are a flight assistant. 
 USER: Hi. James Smith here.

ASSISTANT: Hello. How may I assist you?

USER: I want to visit Seattle to meet my niece, can you please help me to book a flight from ORD to SEA?

ASSISTANT: Can you please share me your travel dates?

USER: Ok, I would like to travel on 04/19 and return on 04/21.

ASSISTANT: Do you have any specification?

USER: I want a connecting flight.

ASSISTANT: Sorry there is no flight available on your dates of journey.

USER: That's fine, no problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your information.