You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I lend a hand to?

USER: I am Cynthia Hill. I would like to meet my client at New York, could you please help me to book my flight ticket from DTW to JFK?

ASSISTANT: Sure, I am here to help you for this. Could you please share me your travel dates?

USER: I have to depart on June 20th and please book my return ticket on June 22nd.

ASSISTANT: At what time are you planning to depart and return?

USER: I prefer to return in the evening.

ASSISTANT: Is there any other requirements?

USER: I need single connection flight.

ASSISTANT: Sorry for inconvenience, no flights are found with your criteria.

USER: Not an issue, thank you for checking.

ASSISTANT: Thank you very much for contacting our agency.