You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Helen Phillips.

ASSISTANT: How can I serve you at this moment?

USER: I am planning to visit Los Angeles, can you please book me a flight ticket from HOU to LAX?

ASSISTANT: Sure, may I know your travel dates please?

USER: I am planning my journey on the dates of June 17 and June 19.

ASSISTANT: Do you have any connection limit?

USER: I prefer connecting flight for this trip.

ASSISTANT: May I know your class preference?

USER: I am comfortable with any class.

ASSISTANT: Please, provide me your airline preference.

USER: I am ok with any airlines.

ASSISTANT: Let me know your departure and arrival timings.

USER: I would like to return in evening flight.

ASSISTANT: Ok, please wait for a while.

USER: Sure, I will wait for your information.

ASSISTANT: Sorry, there are no flights running on your routes as per your travelling details.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for reaching us.