You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: This is Barbara Scott, can you help me to book a flight ticket from LGA to IAH?

ASSISTANT: Yes, please can you share your travel dates?

USER: My preferable journey dates are Oct 30 and Nov 01.

ASSISTANT: Do you have any preferences?

USER: I would like to depart in the afternoon.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry there are no flights in the afternoon time.

USER: No problem, thank you for the information.

ASSISTANT: Thank you.