You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Margaret Thompson.

ASSISTANT: How may I help you today?

USER: I am planning to visit Red Rock canyon national conservation area in Las Vegas, LAS. Can you help me to book a connecting flight?

ASSISTANT: Sure, let me know your travel dates please?

USER: My travel dates are May 14 and 16.

ASSISTANT: Could you please share me your source airport code?

USER: My source is from Houston, IAH.

ASSISTANT: Do you have any specific depart and arrival timings?

USER: I want to return in the afternoon time.

ASSISTANT: Ok, is there any class preference?

USER: No.

ASSISTANT: Do you have any airline preference?

USER: No, I don't have any preferences.

ASSISTANT: Sorry to inform you that there are no flight services available on your given dates.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thanks for contacting us.