You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I aid you?

USER: Rachel Young here, I would like to meet my sister on her birthday. Can you please help me to book my flight ticket from JFK to ORD?

ASSISTANT: Sure, I will help you. May I know your journey dates?

USER: Sure, I want to depart on July 19th and also please book my return ticket on July 21st.

ASSISTANT: Do you have any preferences?

USER: I prefer for a single connection flight.

ASSISTANT: Thanks for your details, please hold on.

USER: Sure.

ASSISTANT: There are no flights found on your data.

USER: Sad to hear that. Anyway, thank you for checking.

ASSISTANT: Thanks for reaching us.