You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Betty Clark here.

ASSISTANT: How may I help you?

USER: Could you book my ticket in a connecting flight?

ASSISTANT: Sure, I am here to help you. Please tell me your travel dates.

USER: My trip dates are Apr 18 and Apr 20.

ASSISTANT: Ok, please provide me your preferred airport codes.

USER: My airport codes are IAH and DFW.

ASSISTANT: Ok, please provide me your class preference.

USER: I am ok with any class. I want to depart in the evening.

ASSISTANT: Ok, please let me know your requirements.

USER: I have no other requirements.

ASSISTANT: As per your requirements, there is a flight available in Hawaiian airlines and the ticket fare is 200 only. Is that ok for you?

USER: Please book my ticket.

ASSISTANT: Your ticket is booked in economy class. Flight departure time is at 1:000AM and arrival time is at 11:00AM.

USER: Thank you.

ASSISTANT: Your flight number is 1009. Thank you for choosing us.