You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Carol Hill.

ASSISTANT: How can I aid you?

USER: I would like to meet my husband on his birthday at Los Angeles, CA-LAX. Could you please help me with booking a flight ticket from Houston, TX-IAH?

ASSISTANT: Sure, I can help you. Can I know your travelling dates?

USER: 01/19 and 01/21 are my travelling dates.

ASSISTANT: Do you need any connecting flight?

USER: Yes, I need  halt in between the journey.

ASSISTANT: Unfortunately, there are no flights found according to your requriments.

USER: No problem, thank you for your help.

ASSISTANT: Thank you.