You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I want to change my reservation, can you help me?

ASSISTANT: Sure, I am here to help you with this. May I know your name please?

USER: I am Sarah Green.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: There is a reservation found under your name, may I know your dates of journey please?

USER: My travel dates are Feb 11 and 13.

ASSISTANT: Ok, may I know your respective airport codes of journey?

USER: My airport codes are from EWR to HOU.

ASSISTANT: Do you have any other specifications please?

USER: I want to return in the morning.

ASSISTANT: Ok, please wait for a mean while.

USER: Sure, I need a connecting flight.

ASSISTANT: There is a direct flight of fare 200 with the UA airline, are you ok with this booking?

USER: You can book it.

ASSISTANT: Ok, your booking is done with the flight number 1013.

USER: Thank you for booking.

ASSISTANT: You are welcome, have a safe journey.