You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Helen Roberts. I would like to book a flight ticket which has normal cost airline preference. Could you please help me with booking a flight ticket?

ASSISTANT: Sure, can I know your travelling dates?

USER: I want like to depart on May 26 and return on May 28.

ASSISTANT: Ok, let me know your source and destination airport codes?

USER: Sure, my source airport code is EWR and destination airport code is HOU.

ASSISTANT: Let me know your connection limit?

USER: I want break in between the journey.

ASSISTANT: May I know your depart and return time?

USER: Sure, I want o depart in the afternoon.

ASSISTANT: Which class do you prefer?

USER: I comfortable with any class.

ASSISTANT: Sorry, there are no flights found on given dates.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for reaching us.