You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Can you please help me in booking my ticket from ORD to DTW?

ASSISTANT: What type of help that you are expecting from my side? Sure, I can help you with booking.

USER: Thank you.

ASSISTANT: I need your departure and arrival travel dates to find the flight, can you please provide?

USER: Sure, my travelling dates are from 10/07 to 10/09.

ASSISTANT: Do you need any other preferences for your journey?

USER: I would like to prefer economy class with 1 connecting flight.

ASSISTANT: May I know your name please?

USER: Myself Sandra Phillips. Also, I like to travel in normal cost flight.

ASSISTANT: Thank you for your information, I am unable to search a flight in normal cost due to sold out of tickets.

USER: It's ok, thank you for your help.

ASSISTANT: You are welcome and thank you for approaching us.