You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Dorothy Young here.

ASSISTANT: How can I help you today?

USER: I want to travel from LAS to IAH for my business trip, can you please reserve a flight ticket between those locations?

ASSISTANT: Sure, I am very happy to help you with that, may I know your planning dates?

USER: Thank you, my departure is on Aug 01 and please book my return ticket also on Aug 03.

ASSISTANT: Do you have any class preference?

USER: No, I don't have any class preference.

ASSISTANT: Can I know your connection limit?

USER: I want to single connection for my journey.

ASSISTANT: Do you have any other specifications?

USER: I would like to departure at morning time.

ASSISTANT: Sorry, no flights are found on your travel dates.

USER: Oh! Sad to hear that. Anyway, thank you for the information.

ASSISTANT: Thank you for reaching us.