You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I eagerly want to meet my father, I would like to book a ticket. Could you please help me out?

ASSISTANT: May I know your location codes?

USER: Sure, my airport codes are from IAD to LGA.

ASSISTANT: On which dates you want to travel?

USER: I would like to travel on 06/10 and return on 06/12.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry for inconvenience, there is no flight found with your requirements. Do you have any other dates to travel?

USER: No, thank you for your information.

ASSISTANT: Thank you. May I know your name?

USER: Myself Sarah Turner.

ASSISTANT: Thank you.