You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you help me to book a flight ticket from SFO to PHL to attend a business meeting?

ASSISTANT: Sure, when do you want to leave and return?

USER: Jan, 1 and Jan, 3 are my trip dates.

ASSISTANT: Please share me your name.

USER: My name is Anthony Taylor.

ASSISTANT: At what time do you like to travel?

USER: I am comfortable with any timings.

ASSISTANT: Do you have any other specifications?

USER: I need to travel in economy class with single connection.

ASSISTANT: Sorry, there is no flight available at this moment.

USER: It's ok, no worries. Thank you.

ASSISTANT: Thank you for choosing us.