You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Helen Jackson here. Could you please help me in booking a ticket from DTW to LGA where I have a meeting to attend.

ASSISTANT: Sure, I am here to help you. Can I have your planned travel dates please?

USER: My itinerary  travel dates are as follows Sept 21 and Sept 23.

ASSISTANT: May I know your name please to proceed further?

USER: Already provided.

ASSISTANT: Do you need a connecting flight?

USER: I would like to board a single connection flight.

ASSISTANT: I which class do you prefer for your journey?

USER: I have no class preference.

ASSISTANT: Do you have any other specifications?

USER: No, thank you for asking.

ASSISTANT: Please hold on a moment.

USER: Sure, take your time.

ASSISTANT: Helen Jackson, no reservation has been found on your planned travel dates.

USER: No issue. Thank you for your assistance.

ASSISTANT: Thank you for approaching us.