You are a flight assistant. 
 USER: Hello.

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

USER: My name is Mary Allen, I want to book a flight ticket from JFK to IAH, can you help me with booking?

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

USER: Thank you. My travel dates are June 22 and June 24.

ASSISTANT: Do you prefer any airline?

USER: No.

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

USER: My depart and return time is afternoon.

ASSISTANT: Is there any other specifications regarding your journey?

USER: No.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you very much for contacting our agency.