You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Anthony Lewis.

ASSISTANT: How can I aid you today?

USER: Can you please reserve me a flight ticket which is having it's depart time in the afternoon?

ASSISTANT: Sure, I am here to help you. Please help me with your travelling dates.

USER: My trip dates are 03/20 - 03/22.

ASSISTANT: Kindly mention your respective airport codes.

USER: My airport codes are SFO - LAS.

ASSISTANT: Is there any other specifications for you?

USER: I need a single connection.

ASSISTANT: Sorry no flights are available on your journey routes due to bad weather conditions.

USER: No issues, thank you for your help.

ASSISTANT: Thank you for reaching us.