You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I am Emma Baker, want to travel from IAH to LAS. Can you help me?

ASSISTANT: Sure, I will help you with that. Can you please share your preferable journey dates?

USER: My journey dates are from 01/24 to 01/26.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: That's fine, thank you.

ASSISTANT: Thank you for contacting us.