You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I be of your service?

USER: I want to travel JFK to meet my friend, can you please help me to book flight ticket from SFO?

ASSISTANT: Sure, we are mirthful to assist you in booking.

USER: Thank you.

ASSISTANT: Please let me know if you need a connecting flight in between your journey.

USER: I need a direct flight for this journey.

ASSISTANT: May I know if you have any depart and return timings?

USER: I am comfortable with any timings.

ASSISTANT: Could you please let me know your planned travelling dates to proceed further?

USER: I planned to travel on June 26 and June 28.

ASSISTANT: Is there any other preferences that you would like to add before booking?

USER: I do not have any other preferences.

ASSISTANT: Before check with the airlines, may I know your name please?

USER: Sure, I am James Jackson.

ASSISTANT: Thank you for sharing your journey details, please wait a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, we are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

USER: Ok, not a problem. Thank you for the help.

ASSISTANT: Thank you for approaching us.